BlobRelationRow

One edge incident to a blob, as GET /api/blobs/{id}/relations reports it. The peer is
whatever sits on the other end — a resource (with its title), a cogmap, or another blob
— so peer_table rides along and peer_title is null for non-resource peers.
direction is the edge listing's own vocabulary (outgoing = the blob is the source).

{ "created": "2019-08-24T14:15:22.123Z", "direction": "outgoing", "edge_id": "b311b798-212e-414c-ba53-c572923101d4", "edge_kind": "express", "label": "string", "peer_id": "118d4485-cd94-4ecd-b71e-80f79647bc58", "peer_table": "string", "peer_title": "string", "polarity": "forward", "weight": 0 }